JPH07216907A - Building method of building foundation and manufacture of foundation member - Google Patents

Abstract

PURPOSE:To save manpower by assembling a thin shell concrete construction member which is a reinforcement-built-in plane view-channel type or an L type on the bottom of a foundation and casting concrete inside so as to integrate. CONSTITUTION:Opposed ends are loaded on a foundation E, and a pair of channel type PC foundation construction members A are installed all over the outer surfaces of PC underground beams D where connection reinforcements 3 are projected from the end faces. Then, concrete is cast into a space F formed between the member A and the beams D. The members A and the beams D and the foundation E are integrated by way of the concrete, thereby building up a one-piece building foundation. In case when the beams are crossed in every direction, a plane-view channel type PC foundation construction member B having a channel type notched part which opens to the upper end or a plane- view L type PC foundation construction member C is installed to the center of a side piece which crosses both sided pieces. This construction makes it possible to secure its integral capacity with after-cast concrete, and to eliminate the need for stripping work and reduce idle time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of constructing a foundation portion of a building structure and a method of manufacturing a foundation member.

[0002]

2. Description of the Related Art In constructing a foundation portion (footing portion) of a building structure, after placing a pile 101 and excavation work, after arranging a reinforcing bar 102 in the footing portion, a formwork 103 is surrounded. The method is to assemble and pour concrete, and after the concrete is hardened, the formwork is dismantled and removed. (See FIGS. 16 and 17)

[0003]

The above-mentioned conventional method generally requires work below the ground, and the workability is poor due to spring water or the like, and it is difficult to secure good quality of the concrete skeleton. In addition, backfilling and subsequent work such as floor construction cannot be undertaken until the cast concrete has hardened and the formwork has been removed.

The present invention has been proposed in view of the above-mentioned problems of the prior art, and its object is to construct a building foundation and a foundation member for shortening the construction period and ensuring the quality of the foundation. Is to provide a manufacturing method of.

[0005]

In order to achieve the above object, according to the method for constructing a building foundation according to the present invention, a flat groove type or L type thin wall type precast concrete foundation in which reinforcing bars are built in advance. After assembling the constituent members on the base bottom plate, concrete is poured into the assembled member to integrate the cast concrete and the basic constituent member.

Further, according to the method of manufacturing a foundation member constituting the building foundation according to the present invention, a plurality of thin-walled pieces of concrete constituting the thin-walled type precast concrete foundation constituent member are placed at different times. , Assembling the concrete thin wall pieces. According to a third aspect of the present invention, a part of the thin-walled piece of concrete that constitutes the basic constituent member is cast on a horizontal surface plate, and after the cast concrete exhibits a predetermined strength, the thin-walled piece is removed. Erected,
Next, concrete of the remaining thin-walled pieces is placed on the surface plate between the thin-walled pieces or in contact with the thin-walled pieces.

[0007]

According to the present invention, as described above, the flat groove type or L type thin wall type precast concrete (hereinafter referred to as PC) foundation component member in which the reinforcing bar is incorporated is used, and
By assembling the C foundation components on the foundation bottom plate at the construction site and placing concrete on the foundation bottom plate surrounded by the respective PC foundation components, the same concrete and the PC foundation components and the foundation are placed. The base part that is integrated with the surface plate is configured to save labor. It is possible to increase the roughness of the inner surface of the PC foundation component of the foundation,
Integration with post-cast concrete is achieved.

Further, according to the method for manufacturing a base member of the present invention, the manufacturing of the member is simplified by shifting the concrete casting of the plurality of thin-walled parts constituting the same member. According to the invention of claim 3, after a part of the thin-walled piece constituting the base member is cast and the cast concrete exhibits a predetermined strength, the part of the thin-walled piece is surface-plated. The thin-walled foundation of the thin-walled mold is raised by standing up and placing the remaining thin-walled piece of concrete on the surface plate by contacting the thin-walled pieces as a formwork or between the same pieces. The component member is easily manufactured, and the rough surface finish of the inner surface of the thin-walled piece of the member is easily performed.

[0009]

The present invention will be described below with reference to the illustrated embodiments. A, B, and C are each a PC base component having a groove-shaped plane, (see FIG. 6), and a plane provided with a groove-shaped cutout 1 opening at the upper end in the center of the side piece orthogonal to the left and right side pieces Groove-type PC component, (see FIG. 7) as well as plane-L-shaped PC
Reinforcing bars 2 are built in the respective constituent members (see FIG. 8), and end hook portions thereof are provided so as to project from the inner surface and the top surface of the member.

1 and 2 show a method of constructing a building foundation when the PC underground beams D are arranged in one direction, the opposite ends are mounted on the bottom E, and the connecting rebars 3 are connected from the end faces. A pair of groove-shaped PC foundation components A facing each other are arranged between the outer surfaces of the PC underground girders D projecting from each other, and between the respective foundation components A and the PC underground girder D. Concrete is poured into the formed space F, and a building foundation in which the PC foundation component A, the PC underground beam D, and the floor E are integrated is constructed through the poured concrete.

In the figure, 4 is a pile, 5 is a column steel frame, and 6 is an angle member which is arranged so as to straddle between the PC foundation component A and the PC underground beam D. FIG. 3 shows a case where the PC underground beams D are arranged in the front-rear direction and the left-right direction orthogonal to each other, and the PC foundation component B is provided between the outer surfaces of the adjacent PC underground beams D.
Alternatively, C is provided. When the PC basic component B is used, the PC underground beam D is fitted in the groove-shaped cutout portion 1. In the figure, the same parts as those in the above embodiment are designated by the same reference numerals.

FIG. 4 and FIG. 5 show the case where the present invention is applied to an independent foundation.
Concrete is poured into the space F formed between the C foundation constituent members A and A, and the cast concrete, the PC foundation constituent member A, and the bottom plate portion E are integrated. 7 in the figure
Is a reinforcing bar for an anchor arranged on the bottom plate portion E, 8 is a reinforcing reinforcing bar, and 9 is an attachment plate member connected to a joint portion of the PC basic constituent member A.

9 to 12 show the PC basic component A.
Fig. 9 shows the manufacturing process of the above, in which the frame pieces b, b ₁ and b ₂ for manufacturing the left and right sides of the groove type PC base constituent member A are respectively provided at two locations on the horizontal surface plate a (see FIG. ), The assembly rebar c is arranged in the same form, and concrete e is poured from a concrete input tool d such as a concrete hopper (see FIG. 9 (a)), and the surface of the cast concrete e is roughened. When the concrete finishes on the surface and the concrete develops a predetermined strength, the three mold pieces b ₁ and b ₂ on the surface plate are removed, and the mold piece b is left upright and erected on the surface plate a (Fig. 10) A turnbuckle type stay or other stay between the retaining ring f of the mold piece b on the surface plate a and the stopper f ₁ mounted on the concrete upper end e ″ (see FIG. 11B). h was attached, the lower end of the concrete e member was fixed with the form piece b ₂ , and thus set on the surface plate a. The assembled rebar i is built between one pair of concrete e members, and the concrete k is placed through a concrete throwing tool j such as a concrete hopper to finish the surface rough (see FIG. 11 (a)). When the predetermined strength is exhibited, the PC basic constituent member A as shown in FIG. 12 is constituted.

FIGS. 13 to 15 show a method of manufacturing an L-shaped PC base component C. Assembling a four-sided mold piece as shown in FIG. A horizontal assembly rebar i is arranged, a vertical assembly rebar i'is erected, and concrete e is poured from the concrete throwing tool d into the mold pieces on the four sides to form one side of the member C. (See FIG. 13) When the concrete e develops sufficient strength, the three mold pieces b ₁ and b ₂ are removed and erected on the surface plate a, and the locking ring f of the mold piece is formed. Is supported by a stay h arranged between a stopper f ₁ mounted on the upper end of the concrete and the concrete e on the surface plate a in this state.
The mold pieces b ₁ and b ₂ facing each other, the assembly rebar i ′ is arranged in the mold, and the concrete e ′ on the other side of the member C is cast (FIG. 14A). After the hardening of the concrete e ′, the production of the L-shaped PC foundation component C in which both the concretes e and e ′ are integrated is completed. (See Figure 15)

[0015]

As described above, according to the method of constructing a building foundation according to the present invention, a plane groove type or L type in which a reinforcing bar is built in advance is used.
By assembling the thin-walled PC base constituting member on the base bottom plate portion, and placing concrete in the assembling member to integrate the base constituting member, the thin-walled PC base constituting member of the base portion is formed. It can also be used as a formwork to increase the roughness of the inner surface side, ensure the integrity with post-cast concrete, and eliminate the need for demolding when placing concrete,
The waiting time can be shortened, labor can be saved, and short-term start of subsequent processes can be possible.

Further, by using the PC product, it is possible to improve the accuracy of the foundation part, secure the accuracy of the bar arrangement, and improve the durability in combination with the quality improvement of the concrete. It is possible to significantly improve the sex.
In the method of manufacturing a base member according to the present invention, the manufacturing is performed by placing concrete of a plurality of thin-walled pieces constituting a thin-walled PC base component at different times and assembling the concrete thin-walled pieces. It can be simplified.

According to a third aspect of the present invention, a part of thin-walled concrete that constitutes the basic constituent member is cast on a horizontal surface plate, and the cast concrete exhibits a predetermined strength.
By constructing the thin-walled pieces, and then placing the remaining thin-walled pieces of concrete between the thin-walled pieces or in contact with the thin-walled pieces on the surface plate to manufacture a basic component. By simplifying and placing each thin-walled piece on a horizontal surface plate, the surface can be easily finished to a rough surface and integrated with post-cast concrete.

[Brief description of drawings]

FIG. 1 is a plan view showing an implementation status of an embodiment of a method for constructing a building foundation according to the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a plan view showing an implementation status of another embodiment of the method for constructing a building foundation according to the present invention.

FIG. 4 is a plan view showing an implementation status of still another embodiment of the method for constructing a building foundation according to the present invention.

5 is a vertical side view of FIG.

FIG. 6 is a perspective view showing a planar groove type PC foundation component.

FIG. 7 is a perspective view showing another embodiment of the planar groove type PC basic component member.

FIG. 8 is a perspective view of a plane L-shaped PC base component.

9 (a) and 9 (b) show an embodiment of a method for manufacturing a flat-groove type PC base component, a vertical cross-sectional view showing a concrete placing step on a surface plate, and a perspective view of a mold piece. It is a figure.

FIG. 10 is a vertical cross-sectional view showing a process of raising a PC member.

11 (a) and 11 (b) are a vertical cross-sectional view showing a process of installing the assembled rebar between the PC members and a perspective view showing details of the stay attaching portion.

FIG. 12 is a perspective view of a PC basic component manufactured by the above process.

FIG. 13 is a vertical cross-sectional view showing a manufacturing process of one of the L-shaped PC basic component members.

14 (a) and 14 (b) are a longitudinal sectional view and a perspective view of a concrete formwork piece showing a manufacturing process of the other piece of the member.

FIG. 15 is a perspective view showing a completed state of the L-shaped PC basic component member.

FIG. 16 is a vertical cross-sectional view showing a conventional foundation construction method for a building.

FIG. 17 is a plan view of FIG.

[Explanation of symbols]

A PC basic structural member B PC basic structural member C PC basic structural member D PC Underground beam E Bottom part F space 1 Groove type cutout 2 Reinforcing bar 3 Connection reinforcing bar 4 Pile 5 Column steel frame 6 Angle member 7 Reinforcing bar 8 Reinforcing bar 9添板member a platen _{b, b ', b 1,} b 2 Formwork piece c assembling rebar d concrete poured instrument e concrete f retainer loops f ₁ stop g angle member h stay i assembling rebar j concrete poured tool k concrete

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Satoshi Kobayakawa 4-6-15 Sendagaya, Shibuya-ku, Tokyo Fujita Co., Ltd.

Claims (3)

[Claims] 1. A flat groove type in which reinforcing bars are built in advance, or L
A thin-walled precast concrete foundation component of a mold is assembled on the foundation bottom plate portion, and then concrete is poured into the assembly member to integrate the cast concrete and the foundation component member. How to build a building foundation. 2. A method of manufacturing a base member, comprising placing concrete of a plurality of thin-walled pieces constituting the thin-walled precast concrete foundation member at different times and assembling the concrete thin-walled pieces. . 3. Part of thin-walled piece of concrete that constitutes the foundation component is cast on a horizontal surface plate, and after the cast concrete exhibits a predetermined strength, the thin-walled piece is erected. The method for manufacturing a base member according to claim 2, wherein the remaining thin-walled pieces of concrete are then cast on the surface plate between the thin-walled pieces or in contact with the thin-walled pieces.